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Heat Transfer & Hydraulic Resistance at Supercritical Pressures in Power Engineering Applications
By
ISBN-10:
0791802523
No. of Pages:
300
Publisher:
ASME Press
Publication date:
2007
Citation
Pioro, IL, & Duffey, RB. "Hydraulic Resistance." Heat Transfer & Hydraulic Resistance at Supercritical Pressures in Power Engineering Applications. Ed. Pioro, IL, & Duffey, RB. ASME Press, 2007.
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In general, the total pressure drop for forced convection flow inside a test section installed in the closed-loop system can be calculated according to the following expression: where Δp is the total pressure drop, Pa.
Δpfr is the pressure drop due to frictional resistance (Pa), which defined as where ξfr is the frictional coefficient, which can be obtained from appropriate correlations for different flow geometries. For smooth circular tubes, ξfr is as follows (Filonenko 1954): Equation (12.3) is valid within a range of Re = 4.103 − 1012.
Usually, thermophysical properties and the Reynolds number in Equations (12.2) and (12.3) are based on arithmetic average of inlet and outlet values.
Δpℓ is the pressure drop due to local flow obstruction (Pa), which is defined as; where ξℓ is the local resistance coefficient, which can be obtained from appropriate correlations for different flow obstructions.
General Correlation for Total Pressure Drop
Experiments on Hydraulic Resistance of Water at Supercritical Pressures
Experiments on Hydraulic Resistance of Carbon Dioxide at Supercritical Pressures
Practical Prediction Methods for Hydraulic Resistance at Supercritical Pressures
Tubes
Helically Finned Bundles
Conclusions
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